FAMILY CLERIDAE (Checkered beetles) J. McNamara The clerids include 50 species in Canada and Alaska. Most species are predaceous, the adults feeding on adult bark beetles while the larvae feed on eggs, larvae and adults of wood-boring beetles in galleries. Several species of Enoclerus and Thanasimus are believed to be important in the natural control of bark beetles in coniferous forests. Adults of Cleridae are found mostly on plants, tree trunks or under bark. Some are found on flowers, feeding on pollen. Some species of Necrobia are scavengers and are economically important as pests of stored food, carcasses and skins. In North America the taxonomy of clerids is reasonably well-known but the literature is scattered and a revision of the family would be helpful. A key to the genera has been published by Barr (1962a). There is no comprehensive work for the Canadian fauna; however, most eastern species could be identified using Knull (1951) and most western species using Barr (1962b). AK (5); YK (3); NT (5); BC (22); AB (10); SK (7); MB (14); ON (32); PQ (25); NB (11); NS (4); NF (2); I (5) Subfamily CLERINAE Tribe Tillini Genus MONOPHYLLA Spinola Elasmocerus LeConte Macrotelus Klug M. terminata (Say) - - - - - - - ON - - - - - - megatoma Spinola Genus CYMATODERA Gray C. bicolor (Say) - - - - - - - ON PQ - NS - - - C. decipiens Fall - - - BC - - - - - - - - - - C. inornata (Say) - - - - - - - ON PQ - - - - - tenera LeConte C. ovipennis LeConte - - - BC - - - - - - - - - - pilosella LeConte C. undulata (Say) - - - - - - - ON - - - - - - boscii (Chevrolat) longicollis Spinola vauthieri Spinola Tribe Phyllobaenini Genus PHYLLOBAENUS Dejean Hydnocera Newman P. dubius (Wolcott) - - - - - SK MB - - - - - - - P. humeralis (Say) - - - BC AB SK MB ON PQ NB - - - - cyanescens (LeConte) cyaneus (Spinola) difficilis (LeConte) P. lecontei (Wolcott) AK - NT BC - SK MB ON PQ NB - - - - P. pallipennis (Say) - - - - - - MB ON PQ NB NS - - - serratus (Newman) P. scaber (LeConte) - - - BC - - - - - - - - - - P. subfasciatus (LeConte) - - - BC AB SK MB - - - - - - - P. unifasciatus (Say) - - - - - - - ON - - - - - - punctatus (Spinola) P. verticalis (Say) - - - - - - - ON PQ NB - - - - brachypterus (Klug) lineatocollis (Spinola) tenellus (Say) Genus ISOHYDNOCERA E.A.Chapin I. curtipennis (Newman) - - - - - - MB ON PQ NB NS - - - longicollis (Ziegler) I. tabida (LeConte) - - - - - - - ON PQ - - - - - Tribe Thaneroclerini Genus ZENODOSUS Wolcott Z. sanguineus (Say) - - - - - - - ON PQ - - - - - Tribe Clerini Genus PRIOCERA Kirby P. castanea (Newman) - - - - - - - ON PQ - - - - - maculata Ziegler rufescens Spinola Genus OPILO Latreille O. domesticus (Sturm)+ - - - - - - - - - - - - - - Genus THANASIMUS Latreille T. dubius (Fabricius) AK - NT BC - - MB ON PQ NB - - - - erythrocephalus (Spinola) ruficeps (Spinola) T. trifasciatus (Say) - - - - - - - ON PQ - - - - - T. undatulus (Say) AK YK NT BC AB - MB ON PQ NB NS - - NF abdominalis Kirby melanocephalus Chevrolat nubilus (Klug) Genus PLACOPTERUS Wolcott Poecilochroa Chevrolat P. thoracicus (Olivier) - - - - - - MB ON PQ - - - - - monilis (Melsheimer) pallipes (Wolcott) Genus ENOCLERUS Gahan E. barri Knull - - - BC - - - - - - - - - - E. coccineus coccineus (Schenkling) - - - - AB - - - - - - - - - corallinus (Fall) E. eximius (Mannerheim) - - - BC - - - - - - - - - - holosericeus (A.White) E. ichneumoneus (Fabricius) - - - - - - - ON - - - - - - rufus (Olivier) E. laetus (Klug) - - - BC - - - - - - - - - - abruptus (LeConte) E. lecontei (Wolcott) - - - BC - - - - - - - - - - nigriventris (LeConte) E. muttkowskii (Wolcott) - - - - - - - ON PQ NB - - - - liljebladi Wolcott E. nigrifrons (Say) - - - - - - - ON PQ - - - - - gerhardi Wolcott testaceipes Wolcott E. nigripes nigripes (Say) - - - - - - MB ON PQ NB - - - - dubius (Spinola) incertus (LeConte) E. nigripes rufiventris (Spinola) - - - - - - - ON PQ NB - - - - E. rosmarus (Say) - - - - - - - ON - - - - - - oculatus (Spinola) E. schaefferi Barr - - - BC - - - - - - - - - - humeralis Schaeffer E. sphegeus (Fabricius) - - - BC AB - - - - - - - - - sobrius (Walker) Genus TRICHODES Herbst Key to North American species: Foster (1976) T. apivorus borealis Wolcott & E.A.Chapin - - - - - - - - - - - - - - interruptus LeConte nuttalli Say trifasciatus Sturm T. nutalli (Kirby) - - - - AB SK MB ON PQ - - - - - T. ornatus hartwegianus A.White AK YK NT BC AB - - - - - - - - - Subfamily KORYNETINAE Tribe Epiphloeini Genus PHLOGISTOSTERNUS Wolcott Phyllobaenus Spinola P. dislocatus (Say) - - - - - - MB ON PQ NB - - - - distrophus (Klug) transversalis (Spinola) Genus NEICHNEA Wolcott & E.A.Chapin N. laticornis (Say) - - - - - - - ON - - - - - - Tribe Enopliini Genus NEORTHOPLEURA Barr Key to species: Barr (1976) N. thoracica (Say) - - - - - - - ON PQ - - - - - bimaculata (Melsheimer) nigripennis (Spinola) pennsylvanica (Chevrolat) punctatissima (Chevrolat) Genus CHARIESSA Perty Brachymorphus Chevrolat C. elegans Horn - - - BC - - - - - - - - - - lemberti La Rivers C. pilosa (Forster) - - - BC AB SK MB ON PQ - - - - - cincta (Spinola) marginata (Say) onusta (Say) Genus BOSCHELLA Barr B. fasciata (LeConte) - - - BC - - - - - - - - - - trilobata (Van Dyke) Genus CREGYA LeConte Galeruclerus Gahan C. oculata (Say) - - - - - - - ON - - - - - - marginipennis (Spinola) Tribe Korynetini Genus NECROBIA Olivier N. ruficollis (Fabricius)+ - - - BC - - - ON PQ - - - - - N. rufipes (DeGeer)+ - - - BC AB - - ON PQ - - - - - N. violacea (Linné)+ AK YK NT BC AB SK MB ON PQ - - - - NF errans Melsheimer Subfamily TARSOSTENINAE Genus TARSOSTENUS Spinola T. univittatus (Rossi)+ - - - BC - - - - - - - - - - albofasciatus (Melsheimer) .